package mamikeji.liaowa.widget.xiu;

/**
 * 圆形头像
 * Created by LGL on 2016/1/12.
 */

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.NinePatchDrawable;
import android.util.AttributeSet;
import android.widget.ImageView;

import mamikeji.liaowa.R;


/**
 * 圆形ImageView，可设置最多两个宽度不同且颜色不同的圆形边框。
 *
 * 设置颜色在xml布局文件中由自定义属性配置参数指定
 */

public class RoundImageView extends ImageView {

	private int mBorderThickness = 0;

	private Context mContext;

	private int defaultColor = 0xFFFFFFFF;

	// 如果只有其中一个有值，则只画一个圆形边框

	private int mBorderOutsideColor = 0;

	private int mBorderInsideColor = 0;

	// 控件默认长、宽

	private int defaultWidth = 0;

	private int defaultHeight = 0;

	public RoundImageView(Context context) {

		super(context);

		mContext = context;

	}

	public RoundImageView(Context context, AttributeSet attrs) {

		super(context, attrs);

		mContext = context;

		setCustomAttributes(attrs);

	}

	public RoundImageView(Context context, AttributeSet attrs, int defStyle) {

		super(context, attrs, defStyle);

		mContext = context;

		setCustomAttributes(attrs);

	}

	private void setCustomAttributes(AttributeSet attrs) {

		TypedArray a = mContext.obtainStyledAttributes(attrs,
				R.styleable.roundedimageview);

		mBorderThickness = a.getDimensionPixelSize(
				R.styleable.roundedimageview_border_thickness, 0);

		mBorderOutsideColor = a
				.getColor(R.styleable.roundedimageview_border_outside_color,
						defaultColor);

		mBorderInsideColor = a.getColor(
				R.styleable.roundedimageview_border_inside_color, defaultColor);

	}

	@Override
	protected void onDraw(Canvas canvas) {

		Drawable drawable = getDrawable();

		if (drawable == null) {

			return;

		}

		if (getWidth() == 0 || getHeight() == 0) {

			return;

		}

		this.measure(0, 0);

		if (drawable.getClass() == NinePatchDrawable.class)

			return;

		Bitmap b = ((BitmapDrawable) drawable).getBitmap();

		Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);

		if (defaultWidth == 0) {

			defaultWidth = getWidth();

		}

		if (defaultHeight == 0) {

			defaultHeight = getHeight();

		}

		int radius = 0;

		if (mBorderInsideColor != defaultColor
				&& mBorderOutsideColor != defaultColor) {// 定义画两个边框，分别为外圆边框和内圆边框

			radius = (defaultWidth < defaultHeight ? defaultWidth
					: defaultHeight) / 2 - 2 * mBorderThickness;

			// 画内圆

			drawCircleBorder(canvas, radius + mBorderThickness / 2,
					mBorderInsideColor);

			// 画外圆

			drawCircleBorder(canvas, radius + mBorderThickness
					+ mBorderThickness / 2, mBorderOutsideColor);

		} else if (mBorderInsideColor != defaultColor
				&& mBorderOutsideColor == defaultColor) {// 定义画一个边框

			radius = (defaultWidth < defaultHeight ? defaultWidth
					: defaultHeight) / 2 - mBorderThickness;

			drawCircleBorder(canvas, radius + mBorderThickness / 2,
					mBorderInsideColor);

		} else if (mBorderInsideColor == defaultColor
				&& mBorderOutsideColor != defaultColor) {// 定义画一个边框

			radius = (defaultWidth < defaultHeight ? defaultWidth
					: defaultHeight) / 2 - mBorderThickness;

			drawCircleBorder(canvas, radius + mBorderThickness / 2,
					mBorderOutsideColor);

		} else {// 没有边框

			radius = (defaultWidth < defaultHeight ? defaultWidth
					: defaultHeight) / 2;

		}

		Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);

		canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight
				/ 2 - radius, null);

	}

	/**
	 * 获取裁剪后的圆形图片
	 */

	public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {

		Bitmap scaledSrcBmp;

		int diameter = radius * 2;

		// 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片

		int bmpWidth = bmp.getWidth();

		int bmpHeight = bmp.getHeight();

		int squareWidth = 0, squareHeight = 0;

		int x = 0, y = 0;

		Bitmap squareBitmap;

		if (bmpHeight > bmpWidth) {// 高大于宽

			squareWidth = squareHeight = bmpWidth;

			x = 0;

			y = (bmpHeight - bmpWidth) / 2;

			// 截取正方形图片

			squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,
					squareHeight);

		} else if (bmpHeight < bmpWidth) {// 宽大于高

			squareWidth = squareHeight = bmpHeight;

			x = (bmpWidth - bmpHeight) / 2;

			y = 0;

			squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,
					squareHeight);

		} else {

			squareBitmap = bmp;

		}

		if (squareBitmap.getWidth() != diameter
				|| squareBitmap.getHeight() != diameter) {

			scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,
					diameter, true);

		} else {

			scaledSrcBmp = squareBitmap;

		}

		Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),

		scaledSrcBmp.getHeight(),

		Bitmap.Config.ARGB_8888);

		Canvas canvas = new Canvas(output);

		Paint paint = new Paint();

		Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),
				scaledSrcBmp.getHeight());

		paint.setAntiAlias(true);

		paint.setFilterBitmap(true);

		paint.setDither(true);

		canvas.drawARGB(0, 0, 0, 0);

		canvas.drawCircle(scaledSrcBmp.getWidth() / 2,

		scaledSrcBmp.getHeight() / 2,

		scaledSrcBmp.getWidth() / 2,

		paint);

		paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

		canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);

		bmp = null;

		squareBitmap = null;

		scaledSrcBmp = null;

		return output;

	}

	/**
	 * 边缘画圆
	 */

	private void drawCircleBorder(Canvas canvas, int radius, int color) {

		Paint paint = new Paint();

		/* 去锯齿 */

		paint.setAntiAlias(true);

		paint.setFilterBitmap(true);

		paint.setDither(true);

		paint.setColor(color);

		/* 设置paint的　style　为STROKE：空心 */

		paint.setStyle(Paint.Style.STROKE);

		/* 设置paint的外框宽度 */

		paint.setStrokeWidth(mBorderThickness);

		canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);

	}

}